ASoC: add generic simple-card support

Current ASoC requires card.c file to each platforms in order to
specifies its CPU and Codecs pair.
But the differences between these were only value/strings of setting.
In order to reduce duplicate driver, this patch adds generic/simple-card.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

3 files changed, 121 insertions, 0 deletions

diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig
new file mode 100644
index 000000000000..610f61251640
--- /dev/null
+++ b/sound/soc/generic/Kconfig
@@ -0,0 +1,4 @@
+config SND_SIMPLE_CARD
+        tristate "ASoC Simple sound card support"
+        help
+          This option enables generic simple sound card support
diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
new file mode 100644
index 000000000000..9c3b246792bf
--- /dev/null
+++ b/sound/soc/generic/Makefile
@@ -0,0 +1,3 @@
+snd-soc-simple-card-objs        := simple-card.o
+
+obj-$(CONFIG_SND_SIMPLE_CARD)   += snd-soc-simple-card.o
diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c
new file mode 100644
index 000000000000..b4b4cab30232
--- /dev/null
+++ b/sound/soc/generic/simple-card.c
@@ -0,0 +1,114 @@
+/*
+ * ASoC simple sound card support
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <sound/simple_card.h>
+
+#define asoc_simple_get_card_info(p) \
+        container_of(p->dai_link, struct asoc_simple_card_info, snd_link)
+
+static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+        struct asoc_simple_card_info *cinfo = asoc_simple_get_card_info(rtd);
+        struct asoc_simple_dai_init_info *iinfo = cinfo->init;
+        struct snd_soc_dai *codec = rtd->codec_dai;
+        struct snd_soc_dai *cpu = rtd->cpu_dai;
+        unsigned int cpu_daifmt = iinfo->fmt | iinfo->cpu_daifmt;
+        unsigned int codec_daifmt = iinfo->fmt | iinfo->codec_daifmt;
+        int ret;
+
+        if (codec_daifmt) {
+                ret = snd_soc_dai_set_fmt(codec, codec_daifmt);
+                if (ret < 0)
+                        return ret;
+        }
+
+        if (iinfo->sysclk) {
+                ret = snd_soc_dai_set_sysclk(codec, 0, iinfo->sysclk, 0);
+                if (ret < 0)
+                        return ret;
+        }
+
+        if (cpu_daifmt) {
+                ret = snd_soc_dai_set_fmt(cpu, cpu_daifmt);
+                if (ret < 0)
+                        return ret;
+        }
+
+        return 0;
+}
+
+static int asoc_simple_card_probe(struct platform_device *pdev)
+{
+        struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
+
+        if (!cinfo) {
+                dev_err(&pdev->dev, "no info for asoc-simple-card\n");
+                return -EINVAL;
+        }
+
+        if (!cinfo->name        ||
+            !cinfo->card        ||
+            !cinfo->cpu_dai     ||
+            !cinfo->codec       ||
+            !cinfo->platform    ||
+            !cinfo->codec_dai) {
+                dev_err(&pdev->dev, "insufficient asoc_simple_card_info settings\n");
+                return -EINVAL;
+        }
+
+        /*
+         * init snd_soc_dai_link
+         */
+        cinfo->snd_link.name            = cinfo->name;
+        cinfo->snd_link.stream_name     = cinfo->name;
+        cinfo->snd_link.cpu_dai_name    = cinfo->cpu_dai;
+        cinfo->snd_link.platform_name   = cinfo->platform;
+        cinfo->snd_link.codec_name      = cinfo->codec;
+        cinfo->snd_link.codec_dai_name  = cinfo->codec_dai;
+
+        /* enable snd_link.init if cinfo has settings */
+        if (cinfo->init)
+                cinfo->snd_link.init    = asoc_simple_card_dai_init;
+
+        /*
+         * init snd_soc_card
+         */
+        cinfo->snd_card.name            = cinfo->card;
+        cinfo->snd_card.owner           = THIS_MODULE;
+        cinfo->snd_card.dai_link        = &cinfo->snd_link;
+        cinfo->snd_card.num_links       = 1;
+        cinfo->snd_card.dev             = &pdev->dev;
+
+        return snd_soc_register_card(&cinfo->snd_card);
+}
+
+static int asoc_simple_card_remove(struct platform_device *pdev)
+{
+        struct asoc_simple_card_info *cinfo = pdev->dev.platform_data;
+
+        return snd_soc_unregister_card(&cinfo->snd_card);
+}
+
+static struct platform_driver asoc_simple_card = {
+        .driver = {
+                .name   = "asoc-simple-card",
+        },
+        .probe          = asoc_simple_card_probe,
+        .remove         = asoc_simple_card_remove,
+};
+
+module_platform_driver(asoc_simple_card);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ASoC Simple Sound Card");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");